Beach Placer Deposits of India, their Distribution, Mineralogy and

Heavy mineral sands ore deposits - Wikipedia

Heavy mineral sands are a class of ore deposit which is an important source of
zirconium, titanium, thorium, tungsten, rare-earth elements, the industrial
minerals diamond, sapphire, garnet, and occasionally precious metals or
gemstones. Heavy mineral sands are placer deposits formed most usually in
beach Heavy minerals (dark) in a quartz beach sand (Chennai, India).